Question

14. Which of the following enzymes is involved in both glass and gluconeogenesis Pyruvate carboxylase, b. Phosphofructokinase 1 Triose phosphate Isomerse Pyruvate kinase Heroine 15- Arsenal is an ion that can replace inorganic phosphate (Pi) is the reaction catalyzed by Glyceraldehyde 3-phosphate dehydrogenase, causing the direct conversion of Glyceraldehyde-3 phosphate into - phosphoglycente. NADH is will produced. Which of the following glycolytic metabolites will not be detectable in a cell that is exposed to reale? Glucose 6-phosphate b. Fructose 6-phosphate c. 1.3-bisphosphoglycer 3-phospholycente e2-phosphoglycente 16- Which of the following do you will be the mothycolysis for a cell exposed to arsenate? A net gain of 2ATP and NADH b. A net gain of 1 ATP and 2NADH CA met gain of 2NADH and zero ATP A net gain of 2NADH and a loss of LATP e. None of the above. 17. When you compare the estabolism of a saturated fatty acid to that of an unsaturated fatty acid of equal length, which of the following will you expect to be different? a. The number of rounds of beta-oxidation required for the breakdown b. The number of acetyl CoA units produced during the breakdown The number of NADH molecules produced during the breakdown d. The number of FADH: molecules produced during the breakdown All of the above. 18- Which of the following fatty acids will produce the LEAST amount of energy upon complete oxidation to CO, and H.O? 2-CH-CH-CH-CH:CH-CH:CH-CH-CH-COOH b-CH-CH-CH-CH-CH-CH-CH:CH-CH-COOH. C CH-CH-CH-CH:CH-CH-CH-CH CH-COOH. CH-CH2-CH-CH-CH:-CH-CH:-COOH. C. CH-CH-CH-CH-CH CH-CH-CH CH-COOH. 19- Which of the following is the correct yield in ATP and reduced coenzymes of the citric acid cycle for each molecule of glucose? a. 2NADH + 2FADH2 + 2ATP b. 3NADH + IFADH+ IATP. c2NADH + 2FADH; + 6ATP. d. 6NADH +6FADH; +6ATP. 6NADH +2FADH2 + 2ATP. 20. Which of the following enzymes generales high-energy electrons in the form of FADH.? a. Isocitrate dehydrogenase. b -ketoglutarate dehydrogenase. c. Succinate dehydrogenase. d. Malate dehydrogenase Pyruvate dehydrogenase.

Answer 1

Ans. 14. Among these enzymes, the enzyme that is common in both glycolysis and gluconeogenesis is phosphofructokinase - 1. This enzyme is involved in phosphorylation of fructose. So, the answer is option b.

15. The enzyme glyceraldehyde 3-phosphate dehydrogenase is involved in the formation of 1,3 bisphosphoglycerate. If arsenate is present, 3-phosphoglycerate is formed directly. Therefore, the compound 1,3 bisphosphoglycerate is not formed. So, the answer is option c.

16. In the presence of arsenate, the cell will produce NADH but ATP will not be produced. 2 NADH molecules are produced without formation of any ATP. So, the answer is option c.

17. All of the given statements regarding oxidation of saturated and unsaturated fatty acids is true. So, the answer is option e.

18. The least amount of energy is produced by fatty acid with shortest chain. Over here, we come across the shortest chain in option d, so it produces the least amount of energy. So, the answer is option d.

19. The citric acid cycle produces 6 molecules of NADH, 2 molecules of FADH₂ and 2 molecules of ATP. So, the answer is option e.

20. The enzyme of the citric acid cycle that generates FADH₂ in the form of high energy electrons is succinate dehydrogenase. So, the answer is option e.